Working a hand job too hard with the thumb making direct contact with and collapsing the urethra. Imagine pressing out tooth paste with only your thumb on the underside of a penis with 100 stokes per minute, under the pressure of full grip.

My boy is getting surgery next week to fix the damage from that fat girl that gave him the thumb drive

Verb - the patented technique of hooking your thumb onto a girl's g-spot so that you have opposable pressure on it, which lets you drive her into a wall of orgasm harder than a crash test dummy with no airbags. (uninsurable, acts of god)

"Betty won't be able to answer the phone for a while, she's still recovering from a thumbdrive."
"Is Veronica having a seizure? No she just had a thumb drive, there's no first-aid for this..."